﻿#region License
/*
 * Copyright ©2011-2012 EasyMon Project
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *  
 */
#endregion

using System;
using System.Collections.Concurrent;
using System.Diagnostics;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using EasyMon.Common.Sources;
using EasyMon.Common.Values;
using EasyMon.Server.Extensions;

namespace EasyMon.Server
{
    public static class SystemStatus
    {
        private static volatile ProductValue[] _root;
        public static ProductValue[] Root { get { return _root; } private set { _root = value; } }

        public static TimeSpan Timeout { get; set; }

        static SystemStatus()
        {
            Timeout = TimeSpan.FromSeconds(30);
        }

        public static void Start(SourceRoot root)
        {
            Task.Factory.StartNew(Run, root, TaskCreationOptions.LongRunning);
        }

        private static void Run(object root)
        {
            while (true)
            {
                try
                {
                    var list = new ConcurrentBag<ProductValue>();

                    Parallel.ForEach(((SourceRoot)root).Products, x => list.Add(x.Query()));

                    Root = list.OrderBy(x => x.DisplayName).ToArray();

                    Thread.Sleep(Timeout);
                }
                catch (Exception e)
                {
                    Trace.WriteLine(e.ToString());
                }
            }
        }
    }
}